Super Jet SN hull shortening topside and bottom and moving footholds up

[BBYamaha]

3 years ago I reinforced the engine compartment and added footholds. About 3 months later I bought an 09 and turned the SN into a yard ornament. Over the last few months I have got cabin fever and seen quite a few builds that interested me so I am getting on the bandwagon with a big bang for the motor, even better then my ported big bore 760 I had in it last. I will post pics as I go since the motor project is in the works I figured I would get on the ball with the hull work...

I took off quite a bit off the back, yeah its gonna be squirly, I have the 09 for go fast and stability.

I also choped out the foothold section with the intent of moving it 4-5 inches forward I have removed the exhaust tube for the moment, I will make adjustments to allow it to clear the footholds. I am also going to defoam but I have not decided what to put back inside it but I am plaining on reinforcing the bondline while I have it open and seal all the lines.

 

[SJBrit]

How much did you take off the back? I think you might be surprised at how much more stable it's going to feel, and yet how much more quickly and easily it turns.

 

[CJ407]

use 2 part foam

 

[Matt_E]

I have not decided what to put back inside it

Unless you are a fiberglass god, go for styrofoam. Or face wet 2-part foam down the road.

 

[BBYamaha]

Unless you are a fiberglass god, go for styrofoam. Or face wet 2-part foam down the road.

ha ha I am no where near a fiberglass god, My mad glassing skills is part of the reason for it being torn apart right now, The thing weighed 350 plus with motor after my last glassing try.... I have some friends that are decent at it but would rather use something else.. I saw the thread with styrofoam he shapped in the back. It looked pretty efficient... I have 2 part on the shelf but would rather it stay there.

 

[BBYamaha]

How much did you take off the back? I think you might be surprised at how much more stable it's going to feel, and yet how much more quickly and easily it turns.

I cut it to where I would have 2 bolts holding on the ride plate and its squared off back there. As for the top I took about 4 inches out of it... I also shifted my motor back an inch. Going to start defoam tomorrow. Being unemployed is kinda nice for a while...

 

[BBYamaha]

I took some mesurements. When I started the tray was 32 inches front to back. Now the tray is 27 and 3/8 where I plan to rebuild it in the back. I measured the bottom and I cut 4 inches off the bottom... Did some more defoaming today. What a nightmare.

Here are some more pics of the progress... Pics of what I cut off and pics of where it was and where its going. Tomorrow I plan on mocking up exhaust tube which is getting turned into the pump cavity and the scupper valve I am putting in.

 

[BBYamaha]

More progress today... I trimmed my foothold section to drop it down a bit (based on newer ski designs and guys not foaming there to get lower) I also cleaned all the pipe fittings and removed them with the intention of re sealing them... When I pulled the midshaft I found the pipe was broke that connected the engine compartment to the tunnel area... pics attached! I tugged on the steering cable tube it was half assed in the day.... I would also like to 90 the exhaust tube into the pump area.... any thoughts

 

[swapmeet]

Fill it with ping pong balls! Seriously!

 

[BBYamaha]

It has been mentioned before but I dont know if I can handle the rattle...

 

[swapmeet]

The guy whos done it on here says there is no rattle. His name is Bryan, really nice guy. I've talked to him on the phone about his build.

http://www.x-h2o.com/threads/76412-...widening-zero-SJ-sponsons-plus-more&highlight=

The hull i'm currently buying had two part put in it for the chop/rebuild, but if I ever defoam a ski thats my game plan.

 

[McDog]

polystyrene is cheaper and probably lighter.

 

[BBYamaha]

Progress

Got the footholds glued in place. Next I need to form the foam into the areas in the tray. Also need to plum in the scupper. Also need to put in exhaust pipe and put foam around it. I sealed up all the lines tonight as well. I cut the foothold apart and moved them as far apart to widen the tray and I also moved them up another 2 inches. You can see from the pics the footholds are set a bit lower in the tray. I built a box to support the footholds out of aluminium. I used some micro bead filler and will smooth it out once it dries.